JPS5871264A - Agricultural vehicle - Google Patents

Abstract

PURPOSE:To reduce a turning operation force and to change the direction of the left and right front wheels quickly and lightly by actuating a steering handle to the turning side in accompany with the stoppage of the driving rotation of one of the left and right rear wheels on the turning side. CONSTITUTION:Individual steering brakes 29 of the left and right rear wheels 2 are operated by a pair of left and right brake operation pedals 30. The direction of the left and right rear wheels 1 is changed by a steering handle 7 through a pitman arm 34, drag link 35, and pivot case 32. And, a pair of springs 36a, 36b actuating the handle 7 to the left turning side and right turning side are provided so as to act on an arm 37 fixed to the pivot case 32. The actuating or non- actuating actions of the springs 36a, 36b are switched by a hydraulic cylinder 38, which is controlled by a control valve 39. The switching control of the control valve 39 is performed in accordance with the operation of the pedal 30 through an arm 40.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a mechanism for changing the direction of one of a pair of left and right front wheels and a pair of left and right rear wheels, and a mechanism for changing the direction of each of the left and right electric wheels that cannot be operated for changing the direction. The present invention relates to an agricultural work unit provided with a mechanism for driving the drive rotation so that each VC can be stopped individually.

According to the above agricultural work lfl/il:, the action of simultaneously changing the force of one of the left and right front wheels and the left and right rear wheels and the action of stopping the drive rotation of one of the left and right wheels that do not change However, as a direction change operation mechanism, a rotationally operated steering wheel was generally used as a direction change operation mechanism. Pitman arms, drag links, tie rods, etc. that are swung by the handlebars are used to direct the vehicle with good contact using the operating force of the work vehicle. On soft ground where the vehicle is sunk in the ground, it takes an extremely large amount of effort to turn the wheels for a turn, and it is necessary to quickly and lightly operate the wheels over a wide range for sharp turns. For this reason, it has been considered to use a so-called power steering device that changes the direction of the wheels using a fluid pressure cylinder that expands and contracts by an amount corresponding to the amount of rotation of the steering wheel. However, due to the high cost of this device, it was difficult to put it into practical use.

The present invention has been made in view of the above circumstances, and by adding an inexpensive and simple structure, it is possible to quickly and easily change the direction of the wheels when making a sudden turn with a small amount of operating force. This is what I am trying to do.

Embodiments of the present invention will be described in detail above based on illustrative drawings.

As shown in FIGS. 1 and 2, a pair of left and right fi wheels (tll and ill) that can be driven and rotated and whose direction can be manipulated, a pair of left and right rear wheels that can be driven and rotated (21, and an engine (
3), a transmission clutch (4) whose output is transmitted by a belt;
), the transmission case (5) whose output is transmitted to the shaft 11a+
, an electric vehicle equipped with a driver's seat (3), a rotatable steering wheel (7), etc.
, 5 sheets of mat-like bacteria (Wl are arranged horizontally and placed on the 1st floor and reciprocated horizontally with a constant stroke (multiple cupboards (8), each cloak-shaped FM tw)... A planer claw (9) for taking out the 11th-sized seedling from the upper end, and a moeding claw (9) with a plurality of ground leveling tools 70-totiIIl... that are not adjusted to a lateral force of 11JI. It is connected to the device wake up/down operation + 1J function, and is configured to sequentially price five items as the aircraft advances.

To configure the transmission clutch (4), as shown in Fig. 2, the clutch case (11), through which one engine output is transmitted through the belt, is connected to the bearing (1) with respect to the output shaft +l2HC.
The input cylindrical body +141 is spline-connected to the output shaft (1 sq.), and the clutch case (Ill and output qiIIIt12) K is free-rotating support 1.
．． f (disc-shaped member fixed to the clutch operation disc-shaped member (15) and fixed to the input cylindrical body t+41)
The transmission friction plates (18a) and (18b) are arranged in a non-rotatable but slidable manner by each of the support shafts (15a) that pass through the shaft in a slidable manner, allowing the clutch to engage. The spring (19) that biases the crocodile is attached to the disc-shaped member) 1
5)・(National VC established, disc-shaped member 1 for clutch operation)
The O-ring t2Z that is required when the cover (21j is fitted onto the bearing 120) that covers the bearing c201 that is fitted onto the boss portion of
Changed the earmata to 1 inch Q, and changed the clutch case till
VC, the outer surface V of the bearing cover 41+ (seal 1 with a lip that slides in contact) is attached to the clutch operating cylindrical body O1 output shaft that contacts and suppresses the bearing cover (21 on the clutch disengagement side). 021 and is supported in the relative rotation Ii LjJ function, and is provided in a state in which it is linked with the clutch operation pedal (see Fig. 1), so that it can be operated by depressing the pedal 4. In addition, by providing a bearing cover (1111), a seal is provided to prevent muddy water from entering the clutch case (inside the clutch case) through the bearing (2o).

As shown in Fig. 3, the curved end fM<vr of the transmission case (5) indicated by Dtl, left and right 1jr+1IjiJIII ・I
ll k't +7) Difference! 1111 times k k rf
F A differential transmission device for driving from the front (F, B 'y--' (knee + l') is installed, and the left and right rear wheels are installed at the rear end inside the IC11 case + T + l. (
21・(21 is provided with a differential 1σ1y speed device li SH η for driving the 21 while allowing its rotation uv 1, and the output from the differential #I transmission l!'I− SH η is transferred to the left and right rear wheels (2). (2
A pair of left and right rear wheels (21 and 21) are connected to each other in a pair of left and right chain cases μs+ (c) that transmit power to the steering wheels (21 and 21). Install the left side 1 pair of pre-key operating pedals 1 tl (Ill) separately for the operating arms (29a) and (29a) of each operating pre-gear 4 and 4, respectively. They are interlocked and connected via wires, and are placed close together so that they can be pressed and operated simultaneously at the foot of (6) during operation. Place the storage case (Jl) in Den-1 case (5) 1
A pair of left and right front wheel support cases υ are connected with bolts at the 11 ends.
(32) is pivotally supported at both ends of the storage case (:(11) so as to be able to swing around the ten-cho axis, and both supporting cases C (2
11t32) are interlocked and connected via a tie rod (33) so that they can be swung in pairs.
7) Pitman arm (3) being swung by iiT e
4) Drag the left side support case (and
It is interlocked and connected via 3 (to), so that the left and right g+
The action of turning one wheel il + (1) and the left and right rear wheels (
By cooperating with the action of stopping the drive rotation of the one on the turning side in 21.(2), it is possible to perform sharp turns well.

As shown in FIGS. 8 and 4, a pair of springs (36a) and (36b) for biasing the n-numbered handle (7) toward the left turning direction and the vise turning direction are attached to the left side. A fluid pressure cylinder (38
), and the hydraulic cylinder (38) is in the non-energized state with a corresponding free telescopic working state ratio, and the leftward turning side spring (
:(6a), the extension actuating base corresponding to the f=l force month 1 state, and the ratio 1 valve switching to the shortening actuating state ratio corresponding to &b in the urging actuation state of the effective swing spring (36b). (
39) at the operating position 1*l'? for the free telescopic operating state. : Control valve operating arm f40) provided with a return-energized structure and supported so as to be able to slide 10F and swing left and right.
9) Switch the control valve (39) by swinging it left and right with respect to π, and switch the control valve (39) by sliding it up and down.
What should I do to avoid manipulation?
li #I is a connected shaped part, and when they are operated one by one for the left and right brake pedals (, i + l + t30), they are operated to the left or the neck force π is pressed and shaken, and they are operated at li1 The arm for operating the control valve 1 + 40 + is biased to return to the lower side, and is also biased to return to the center position of left and right swinging. A spring f441 (42) is installed to stop the drive rotation of only the left or right rear wheel (21. Then, the left and right rear wheels (21) are both driven and rotated, and the left and right rear wheels (
21.) This constitutes a biasing mechanism that becomes a non-biased prone state when both drive rotations in 2) are stopped at VC4kP.

In short, make a sharp turn of 1 m, stop the rotation of the left and right rear wheels (21. In order to reduce the operating force, the left and right curves can be changed quickly and easily.

In addition, in carrying out the present invention, left and right rear wheels (21, (21 is 1)
1゜Also, as a hearing change operation mechanism, the left and right wheels +l+・11) All of them can be integrated after HIT using their left and right center parts as fulcrums.
``The composition of the things that make you shake Vl is the Gods change day, r-noh.

In addition, as a mechanism for driving each of the left and right wheels +21 and ++21, which are not subject to heavy operation, so as to be able to individually stop the rotation of the body, there is a differential transmission gear mechanism 1271 and a steering brake gear mechanism 9). In addition to being configured by a combination, it may be configured by a pair of steering clutches.

In addition, the biasing mechanism is connected to the fluid pressure cylinder (38) described in the embodiment with a pair of brake operation pedals (operations 11r, 4E, etc.). Expansion or contraction can be performed by supplying fluid from a pair of mask cylinders, or a pair of brake operation pedals (
: The same father-type operating mechanism can be pulled or pressed through a spring with the operating force of -, etc.
Various changes are possible.

In addition, the entire operating structure of the drive mJ mechanism-η・4・4 is composed of:
In addition to providing a dedicated operation mechanism (Sakaki (30)), the rotation change operation mechanism is changed from a straight platform to a set range. As the operation returns to within the set T range, both turtle rings)2]・(21
The direction change operation i shallow structure may also be configured to serve as an operating tool for the drive mechanism (2'0, 4, 4) while both are driven and rotated.

That's all! 1 shot of π! 1, in the agricultural work JL mentioned above, the rjt direction change operation mechanism (7), (33), (3
4)・(A state in which the rope is biased toward the rightward turn F4, a state in which the rope is biased in the rightward direction! Claw, and a 1-minute mechanism (86a) that can be switched between the non-biased state. +(36b)+(c) for the sliding mechanism wheels 4 and 4f; K, item i ■ A shape that makes the drive of only the left electric wheel (21 pure land) A shape that urges the right turning point in the road 1, and a drive of only the right wheel (2) All features are such that the right turn is automatically switched to the forward biasing state in the stopping state.

In other words, the direction change operation mechanism (7), (33), (3(
1) (A biasing mechanism (36a) that can be switched between a state in which the 3-unit is biased toward the left turning direction, a state in which the rightward rotation direction is biased VCtVJ, and a non-biased state) (86b)・(3
8), the biasing mechanism (
36a) (86b) By switching the cable to a position in which the cable is biased in the direction of rotation, the wheel 111 fi+
VCL allows you to change the direction quickly and easily with a small amount of operating force.

Moreover, during sharp turns VC 1-2, the drive mechanism is always 2η94.
Focusing on the operation for F6, the biasing mechanism (F6
a)・(86b) I(38) is connected to the drive mechanism (2η1(
291$kl ff, zo〕I, or both wheels (2)・
(With 21 in the unenergized state, the left wheel (21 only) is in a state where the l/12 movement is stopped. By linking the right wheel (2) so that it automatically switches to the right turning side f Mechanism (86a)
+(36b) ・Since there is a special operation for t381, the 1M1lIt)+mechanism (271・1q force Isogaku (86a), (86b) which can be changed to single VCj state attack VcL)J with the operation of U-4 ・Using CAQk - It is possible to make C1 sharp turns well,
As a result, we have obtained an agricultural vehicle that can be conveniently used.

[Brief explanation of the drawing]

Figure 1 illustrates the seat of the agricultural vehicle according to the present invention,
Figure 1 is a side view of a conventional pear rice transplanter, and Figure 2 is a traditional rice transplanter. +I+1
A vertical side view of the clutch, Figure 3 shows the steering ill l+l+
-・Curved axis, 121 +12i・Rear wheel, (7) + (
33)+(34)・(35) Direction change operation mechanism,
(27)・fj9) L wing... Drive mechanism, (86
a'I・(36b)・(:J)it --f'J
'Force organization.

Claims (1)

[Claims] ■ Mechanism 1 for simultaneously changing the force of one of the pair of left and right front wheels i11 (1) and the pair of left and right rear wheels (2) (21).
7) ・Ni) ・(34)
A farm work machine equipped with 4.4, in which the direction change operation mechanism (7), (33), example (35) is turned to the left.
A state in which = is biased, a state in which the effective turning direction is biased, and
Non-tvI status deaf and VC switchable biasing mechanism (36a)・
(36b) - (381 (r, for the drive mechanism described in ia ■η, 4, 4, or the vehicle wheels described in FJn) Driving only the left wheel (2)! @ A state in which the IJ is biased towards left turning at the position where it is stopped, and a state in which the drive of only the right wheel (2) is stopped. Agricultural work unit characterized by being linked so that the effective turning side is automatically switched to the biased state when the left turning side is pressed. It is characterized by being provided with a pair of springs (36a) and (36b) for biasing toward the effective turning side, and a fluid pressure cylinder link for switching them between a biasing state and a non-biasing state. The agricultural vehicle described in the scope item (■) of the end of patent a.